August 31, 1977
|Other names||Shannon Rogers Guess
Shannon Rogers Guess Richardson
Shannon Guess Richardson
|Known for||Sending letters laced with ricin|
|Possession of a toxin for use as a weapon|
|18 years in prison
$367,000 in restitution
|Sentenced (pled guilty)|
|Spouse(s)||Nathan Richardson (2011–present)|
Shannon Richardson (nee Rogers; born August 31, 1977) is an American actress and criminal. She has had minor television and film roles, but is best known for sending ricin-laced letters to U.S. President Barack Obama and New York City mayor Michael Bloomberg, for which she was convicted and sentenced to 18 years imprisonment in 2014.
At the time of her arrest, Richardson lived in New Boston, Texas. She has been married three times. On October 8, 2011, she married Nathan Richardson, a U.S. Army veteran who works as a mechanic in a military depot. As of June 2013, Richardson had five children, ranging in age from 4 to 19, and was pregnant with another. None of them are fathered by her current husband. On July 4, 2013, Richardson gave birth to a baby boy, named Brody, while in custody. Officials said that the baby was born four months prematurely, weighed only two pounds at birth, and that he needed to remain hospitalized. In August 2013, Nathan won temporary custody of Brody.
In May 2013, while going through a divorce, Richardson called the police and accused her husband of mailing letters laced with the poison ricin to several politicians. Nathan Richardson has not been charged with any crime. He told investigators that his wife set him up. Investigators found evidence that she had mailed the ricin-laced letters herself in an effort to set up her estranged husband. Richardson was arrested on June 7, 2013 for her alleged involvement in ricin-laced letters being sent to politicians such as President Barack Obama and New York City mayor Michael Bloomberg. She was charged with "mailing a threatening letter to President Barack Obama".
On June 6, Richardson confessed that she had mailed the three letters, knowing they contained ricin, but claimed her husband made her do it. By June 15, her star meter was #1 on IMDb and remained there for several days. On June 20, a federal judge ordered Richardson be given a psychological examination, based on a request from her court-appointed attorney, who said she had shown "a pattern of behavior" that raised questions about her ability to assist in her own criminal defense.
On June 28, Richardson was indicted and charged in the mailing of ricin-laced letters to Obama and Bloomberg. The three-count indictment accused her of mailing three threatening letters around May 20 to Obama, Bloomberg, and Mark Glaze, the director of Mayors Against Illegal Guns. A criminal complaint filed on June 7 revealed that the FBI had used Mail Isolation Control and Tracking (MICT), a previously undisclosed mass surveillance program run by the U.S. Postal Service, to narrow its investigation to Richardson.
On November 22, Richardson reached a plea agreement on three counts. On December 10, she pled guilty and was sent to the Texas State Prison System. The U.S. government contracts with county and state officials nationwide to hold federal prisoners pending trial.  On July 16, 2014, Richardson was sentenced to 18 years in prison for sending ricin-laced letters to Obama and Bloomberg. 
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- "Shannon Guess Richardson, Texas Woman Who Sent Ricin Letters To Obama, Gets 18 Years In Prison". Huffington Post. July 16 2014.
- Stengle, Jamie (July 16 2014). "Texas Woman Who Sent Ricin Gets 18 Years". ABC News.